Crankshaft - Kubota GR1600EU Workshop Manual

GR1600EU, WSM

(4) Crankshaft

Crankshaft Side Clearance
1. Set a dial indicator with its tip on the end of the crankshaft.
2. Measure the side clearance by moving the crankshaft to the
front and rear.
3. If the measurement exceeds the allowable limit, replace the
thrust bearings.
4. If the same size bearing is useless because of the crankshaft
journal wear, replace it with an oversize one referring to the
table and figure.
Factory specification
Crankshaft side
clearance
Allowable limit
(Reference)
• Oversize thrust bearing
Oversize Bearing
Thrust bearing 1 02
0.2 mm
0.008 in.
Thrust bearing 2 02
Thrust bearing 1 04
0.4 mm
0.016 in.
Thrust bearing 2 04
• Oversize dimensions of crankshaft journal
Oversize
23.40 to 23.45 mm
Dimension A
0.9213 to 0.9232 in.
46.10 to 46.30 mm
Dimension B
1.815 to 1.823 in.
1.8 to 2.2 mm radius
Dimension C
0.071 to 0.086 in. radius
The crankshaft journal must be fine-finished to higher than Rmax = 0.8S.
Crankshaft Alignment
1. Support the crankshaft with V blocks on the surface plate at
both end journals.
2. Set a dial indicator with its tip on the intermediate journal.
3. Measure the crankshaft alignment.
4. If the measurement exceeds the allowable limit, replace the
crankshaft.
Crankshaft alignment Allowable limit
1-S46
0.15 to 0.30 mm
0.0059 to 0.011 in.
0.50 mm
0.0197 in.
Code Number
15261-23950
15261-23970
15261-23960
15261-23980
0.20 mm 0.40 mm
0.0079 in. 0.015 in.
23.80 to 23.85 mm
0.9370 to 0.9390 in.
46.30 to 46.50 mm
1.823 to 1.831 in.
1.8 to 2.2 mm radius
0.071 to 0.086 in. radius
9Y1210595ENS0080US0
0.02 mm
0.0008 in.
9Y1210595ENS0081US0
ENGINE
Marking
020 OS
020 OS
040 OS
040 OS
KiSC issued 11, 2013 A